THIS INSTRUCTABLE IS TO PUT FORTH A CONCEPT FOR BUILDING A PCB ETCHING TANK. IT IS NOT INTENDED TO BE COMPLETE INSTRUCTIONS FOR THE SYSTEM. YOU NEED TO RESEARCH THAT ON YOUR OWN.
I have had difficulty in finding a vessel that is narrow enough to minimize the amount of etching liquid needed to create the PCB. I felt that building a tank completely from scratch, using glass, or plastic, would make for a flimsy device, with lots of caulked joints that might leak.
My solution will be to use the glass top from a casserole dish and a piece of plate glass to create a pocket. Etching fluid is placed in the pocket/tank and the PCB is added. The pictures are self-explanatory.
The lid and glass were found for $0.99, each, at the thrift store. The plate glass is out of a picture frame.
For the lid that I found, the maximum depth of the pocket will be 1-1/4". I would have preferred a depth of only 3/4", but I think this lid will be acceptable.
The plate glass will be caulked to the lid. The lid already has the tank sides and the glass is nice and thick. So, I will have less caulked joints, minimizing leak opportunities, and strong sides.
Another improvement I suggest is to integrate a L.E.D. light array into the stand. Light would then shine through the back of the PCB, so its traces may be examined to make sure they have completely etched. I mistakenly named the front view as the top view.
I do not intend to use a drain valve, though others do.
I will not be answering questions, as I will not be monitoring this post closely.
I accept no liability.